title: Identification of alpha amylase inhibitors from Syzygium cumini Linn seeds.
abstract: The aqueous extract of S. cumini or Eugenia jambolana seeds and Psidium guajava leaves showed higher inhibition against the porcine pancreatic alpha-amylase among the medicinal plants studied. The alpha-amylase inhibitors from S. cumini seeds were separated from the extract by preparative thin layer chromatography into fractions with different Rf values. The fraction with Rf value between 0.285 and 0.43, which showed maximum inhibitory activity, was eluted and analyzed through LC-MS. The compounds identified from the seed extract ofS. cumini were betulinic acid and 3,5,7,4'-tetrahydroxy flavanone, which were reported earlier from S. formosanum and other plants. Dixon plot showed that the inhibition was noncompetitive in nature.
authors.affiliation: Department of Biotechnology, Kumaraguru College of Technology, Coimbatore 641 006, India.
authors.forename: K
authors.initials: K
authors.lastname: Karthic
authors.forename: K S
authors.initials: KS
authors.lastname: Kirthiram
authors.forename: S
authors.initials: S
authors.lastname: Sadasivam
authors.forename: B
authors.initials: B
authors.lastname: Thayumanavan
mesh_terms: D000818:Animals; D004791:Enzyme Inhibitors / Q000302:isolation & purification* / Q000494:pharmacology*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D012639:Seeds / Q000737:chemistry*; D027842:Syzygium / Q000737:chemistry*; D000516:alpha-Amylases / Q000037:antagonists & inhibitors* / Q000378:metabolism
chemical_list: D004791:Enzyme Inhibitors; D010936:Plant Extracts; D000516:alpha-Amylases